If you look at the gifted sportsman, like Tiger Woods, or Ryan Giggs, you can see how they have been built up to be so much more than one person could ever be.

It has a lot to do with just sort of trust in the relationship that builds between the filmmaker and the subject. There are some people who will never be relaxed in front of a camera, and in some ways that's my failing as a filmmaker to not put them at ease. It's also a function of time, and if you have that type of time.

When your entire life is focused around one goal and one goal only, and you have no other pursuits, it enables you to achieve enormous mastery.

If you look at the gifted sportsman, like Tiger Woods, or Ryan Giggs, you can see how they have been built up to be so much more than one person could ever be.

Each project draws you in on its own merits as opposed to an intellectual choice of, "Well, I'm going to shift from vérité filmmaking to more archival."

There is so much investment in it of people's labor time that it will never make money. But there are other documentaries that you might make that are sort of on assignment for television that turn around in three to six months. Then the margin can be much be better for you because you're not spending three-and-a-half years on it. So I think if you're doing documentary films, that's sort of the way to look at it.

I think all of us, looking back on our careers and our lives, there'll probably be a "road not taken" that we'll regret and mourn. Certainly, artists will always feel that way, especially when the path taken was more commercial than the one not taken.